Workplace Hazard

Any source of potential harm, damage, or adverse health effect to workers, visitors, or property within a work environment, including physical, chemical, biological, ergonomic, and psychosocial hazards.

What Is a Workplace Hazard?

Key Takeaways

  • ✓A workplace hazard is anything that could cause harm. A risk is the likelihood that the hazard will actually cause harm and the severity of the outcome.
  • ✓Hazards fall into five main categories: physical, chemical, biological, ergonomic, and psychosocial.
  • ✓Identifying hazards is the first step in any risk assessment process. You can't control what you haven't identified.
  • ✓Some hazards are obvious (exposed wiring, slippery floors). Others are invisible (noise levels, chemical vapors, workplace stress).
  • ✓Employers have a legal duty under OSHA, the UK's HSWA, and equivalent laws worldwide to identify and control workplace hazards.

A workplace hazard is any condition, substance, activity, or situation that has the potential to cause harm. That harm could be immediate, like a fall from an unguarded platform, or it could develop over years, like hearing loss from chronic noise exposure. The key word is potential. A hazard doesn't have to have caused an injury to be a hazard. A frayed electrical cord is a hazard even if nobody has been shocked yet. The distinction between hazards and risks trips up a lot of people. A hazard is the source of potential harm. Risk is the combination of how likely the hazard is to cause harm and how severe that harm would be. A vat of acid is a hazard. The risk depends on whether it's properly contained, whether workers are trained, whether PPE is available, and how often people work near it. Hazard identification is the foundation of every workplace safety program. Whether you're conducting a formal risk assessment, investigating an incident, or simply walking the floor, the question is always the same: what here could hurt someone?

5 typesMain categories of workplace hazards recognized by OSHA and international standards: physical, chemical, biological, ergonomic, psychosocial
5,486Fatal work injuries in the US in 2022, most involving falls, transportation incidents, and contact with objects (BLS, 2023)
60.2%Of US construction fatalities caused by OSHA's 'Fatal Four' hazards: falls, struck-by, electrocution, caught-in/between (OSHA, 2023)
2.93MNonfatal workplace injuries and illnesses in US private industry in 2022 (BLS, 2023)

Types of Workplace Hazards

Workplace hazards are classified into five main categories. Most workplaces have hazards from multiple categories, and many specific situations involve overlapping types.

Hazard TypeDescriptionCommon ExamplesIndustries Most Affected
PhysicalEnergy sources that can cause injuryFalls, noise, vibration, extreme temperatures, radiation, moving machinery, electricalConstruction, manufacturing, mining, utilities
ChemicalSubstances that can cause harm through inhalation, skin contact, or ingestionSolvents, acids, dust, fumes, gases, cleaning agents, pesticidesManufacturing, agriculture, healthcare, cleaning
BiologicalLiving organisms or their byproducts that cause diseaseBacteria, viruses, mold, blood-borne pathogens, animal waste, insect bitesHealthcare, agriculture, veterinary, waste management
ErgonomicWork conditions that strain the bodyRepetitive motion, heavy lifting, awkward postures, prolonged sitting/standing, vibrationAll industries (offices, warehouses, manufacturing, healthcare)
PsychosocialWork organization and social factors affecting mental healthExcessive workload, bullying, harassment, job insecurity, poor management, shift workAll industries, especially healthcare, education, service sector

Physical Hazards in Detail

Physical hazards involve energy transfers that can injure workers. They're the most visible type of hazard and the primary focus of traditional safety programs.

Falls and working at height

Falls are the leading cause of death in construction and one of the top three causes across all industries. Any work at height above 1.8 meters (6 feet) in the US, or 2 meters in the UK and EU, triggers specific fall protection requirements. This includes roof work, ladder use, scaffolding, elevated platforms, and even step stools in some contexts. Fall protection systems include guardrails (the preferred method), safety nets, and personal fall arrest systems (harnesses). The hierarchy matters: prevent the fall first, arrest it only as a last resort.

Machinery and equipment

Unguarded moving parts, pinch points, rotating shafts, and cutting edges cause amputations, crush injuries, and lacerations. Machine guarding, lockout/tagout procedures (LOTO), and safety interlocks are the primary controls. OSHA's machine guarding standards (29 CFR 1910.211-219) require point-of-operation guards, barrier guards, and device guards. Lockout/tagout violations are consistently among OSHA's top 10 most-cited standards.

Noise

Sustained noise above 85 decibels causes permanent hearing damage. OSHA's Hearing Conservation Amendment requires employers to implement a hearing conservation program when noise exposure exceeds 85 dB averaged over an 8-hour shift. This includes noise monitoring, audiometric testing, hearing protection, and training. Common high-noise environments include manufacturing plants, airports, construction sites, and concerts. Noise doesn't just cause hearing loss. It also increases stress, reduces concentration, and contributes to workplace accidents.

Chemical and Biological Hazards

Chemical and biological hazards often aren't visible. Workers can be exposed without realizing it, which makes systematic identification and monitoring essential.

Chemical hazard management

OSHA's Hazard Communication Standard (HazCom) requires employers to maintain Safety Data Sheets (SDS) for all hazardous chemicals in the workplace, label containers properly, and train workers on chemical hazards. The GHS (Globally Harmonized System) standardizes chemical labels and SDS formats internationally. Exposure routes include inhalation (vapors, dust, fumes), skin absorption, ingestion, and injection (needlestick injuries). Industrial hygiene monitoring measures airborne concentrations against OSHA Permissible Exposure Limits (PELs) or ACGIH Threshold Limit Values (TLVs).

Biological hazard controls

Healthcare workers face blood-borne pathogen risks from needlesticks and bodily fluid exposure. Agricultural workers encounter animal-borne diseases, fungal spores, and insect vectors. Laboratory workers handle infectious agents classified by biosafety level (BSL-1 through BSL-4). OSHA's Bloodborne Pathogens Standard (29 CFR 1910.1030) requires exposure control plans, universal precautions, free hepatitis B vaccinations, and post-exposure evaluation. The COVID-19 pandemic highlighted how quickly airborne biological hazards can disrupt entire industries.

Psychosocial Hazards

Psychosocial hazards are the newest category to gain formal regulatory recognition, but they aren't new. Workplace stress, bullying, and excessive workload have always affected workers. What's changed is that regulators and researchers now treat them as occupational hazards requiring the same systematic approach as physical risks.

Common psychosocial hazards

These include high job demands with low control, lack of role clarity, poor organizational change management, workplace bullying and harassment, social isolation (especially in remote work), shift work and long hours, and exposure to traumatic events (common in healthcare, law enforcement, and emergency services). The ISO 45003 standard, published in 2021, provides guidance on managing psychosocial risks within an occupational health and safety management system.

Regulatory environment

Australia leads in psychosocial hazard regulation. Several states have amended their WHS laws to explicitly require employers to identify and manage psychosocial risks. The EU's Framework Directive already covers psychosocial risks under the general duty to protect worker health. In the US, OSHA doesn't have a specific psychosocial hazard standard, but workplace violence guidelines and the General Duty Clause apply. The direction globally is toward greater regulation of these risks.

How to Identify Workplace Hazards

Hazard identification should be systematic, not random. Use multiple methods because no single approach catches everything.

  • Workplace inspections: Walk the floor with a checklist. Look for housekeeping issues, damaged equipment, missing guards, improper storage, and PPE non-compliance. Inspect during normal operations, not just during quiet periods.
  • Job Hazard Analysis (JHA): Break each job task into steps and identify the hazards at each step. This is especially useful for high-risk tasks and helps inform safe work procedures.
  • Incident and near-miss analysis: Review past injuries, incidents, and near-misses to identify recurring hazard patterns. If three people have slipped on the same wet floor in six months, that's a hazard identification gap.
  • Worker consultation: Ask employees. They know which tasks feel risky, which equipment is unreliable, and which shortcuts people take. Anonymous reporting systems increase participation.
  • Safety Data Sheets and chemical inventories: Maintain and regularly review your SDS library to identify chemical hazards. New products enter the workplace frequently, and each one brings its own hazard profile.
  • Health surveillance data: Patterns in audiometric test results, respiratory function tests, or musculoskeletal complaints can reveal hazards that inspections miss.

Workplace Hazard Statistics [2026]

Data on the most common and most dangerous workplace hazards in the current reporting period.

5,486
Fatal work injuries in the US (2022), highest since 2016BLS, 2023
36.4%
Of fatal occupational injuries caused by transportation incidentsBLS, 2023
16.6%
Of fatal injuries from falls, slips, and tripsBLS, 2023
865,000+
Cases of sprains, strains, and tears in US workplaces (2022)BLS, 2023

Frequently Asked Questions

What's the difference between a hazard and a risk?

A hazard is anything that could cause harm: a chemical, a height, a piece of machinery, a workload. Risk is the likelihood that the hazard will cause harm multiplied by the severity of the harm. A lion in a secure cage is a hazard with low risk. A lion walking freely through the office is a hazard with very high risk. Risk assessments evaluate both the hazard and the circumstances surrounding it to determine what controls are needed.

Who is responsible for identifying workplace hazards?

Everyone plays a role, but the legal responsibility falls on the employer. Employers must have systematic processes for hazard identification: regular inspections, risk assessments, and incident investigations. Supervisors are responsible for identifying hazards in their work areas daily. Employees have a duty to report hazards they notice. Safety committees, where they exist, coordinate hazard identification efforts. HR supports by ensuring hazard reporting channels are accessible and that retaliation doesn't occur.

How often should hazard assessments be conducted?

There's no single answer. Formal risk assessments should be reviewed annually at minimum, and updated whenever there's a significant change: new equipment, process modifications, building renovations, or after a serious incident. Daily informal inspections by supervisors catch emerging hazards. Some high-risk industries conduct pre-shift hazard assessments for every work crew. The frequency should match the rate at which conditions change in your workplace.

Can an office really have serious hazards?

Yes. Slip, trip, and fall hazards from loose cables, wet floors, and cluttered walkways cause injuries in offices. Electrical hazards from overloaded power strips and damaged cords are common. Ergonomic hazards from poor workstation setup cause chronic musculoskeletal injuries. Fire hazards from blocked exits and faulty equipment exist in every building. Indoor air quality issues from inadequate ventilation trigger respiratory symptoms. And psychosocial hazards like excessive workload and workplace bullying affect office workers at rates comparable to or higher than manual workers.

What should I do if I discover a serious hazard?

If the hazard poses immediate danger, remove people from the area, barricade or cordon off the hazard, and notify your supervisor or safety officer immediately. Don't try to fix serious electrical, structural, or chemical hazards yourself unless you're qualified. Report it through your company's hazard reporting system. If the employer doesn't address it, employees in the US can file a complaint with OSHA (anonymously if preferred). UK workers can contact the HSE. Document what you found, when you found it, and who you reported it to.
Adithyan RKWritten by Adithyan RK
Surya N
Fact-checked by Surya N
Published on: 25 Mar 2026Last updated:
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